Home / 39,711.20-59,469.60-18,910.40

Finding the Fourth Proportional to 39,711.20, 59,469.60 and 18,910.40

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Solution

The fourth proportional to 39,711.20, 59,469.60 and 18,910.40 is: 28,319.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,711.20 : 59,469.60 = 18,910.40 : x
  2. Step 2: Convert to fraction form
    39,711.20/59,469.60 = 18,910.40/x
  3. Step 3: Cross multiply
    39,711.20x = 59,469.60 × 18,910.40
  4. Step 4: Simplify right side
    39,711.20x = 1,124,593,923.84
  5. Step 5: Solve for x
    x = 1,124,593,923.84/39,711.20
  6. Step 6: Final answer
    x = 28,319.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.